<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区 -->
    <el-card>
      <el-alert type="info" title="添加商品信息" :center="true" :show-icon="true" :closable="false"></el-alert>
      <el-steps :space="200" :active="activeIndex-0" finish-status="success" :align-center="true">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab栏区域 -->
<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
  <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
    <el-tab-pane label="基本信息" name="0">
      <el-form-item label="商品名称"  prop="goods_name">
        <el-input v-model="addForm.goods_name"></el-input>
      </el-form-item>
      <el-form-item label="商品价格"  prop="goods_price">
        <el-input v-model="addForm.goods_price" type="number"></el-input>
      </el-form-item>
      <el-form-item label="商品重量"  prop="goods_weight">
        <el-input v-model="addForm.goods_weight"></el-input>
      </el-form-item>
      <el-form-item label="商品数量"  prop="goods_number">
        <el-input v-model="addForm.goods_number"></el-input>
      </el-form-item>
      <el-form-item label="商品分类" prop="goods_cat">
      <el-cascader
    v-model="addForm.goods_cat"
    :options="cateList"
    :props="cateProps"
    @change="handleChange">
    </el-cascader>
      </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品参数" name="1">
      <el-form-item v-for="item in manyTableDate" :key="item.attr_id" :label="item.attr_name"  prop="goods_name">
        <!-- 复选框 -->
        <el-checkbox-group v-model="item.attr_vals">
    <el-checkbox
    :border="true"
    :key="i"
    v-for="(cb, i) in item.attr_vals"
    :label="cb"></el-checkbox>
  </el-checkbox-group>
      </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品属性" name="2">
      <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
        <el-input v-model="item.attr_vals"></el-input>
      </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品图片" name="3">
      <!-- action表示图片上传API地址 -->
      <el-upload
  :on-success="handleSuccess"
  :headers="headerObj"
  :action="upLoadUrl"
  :on-preview="handlePreview"
  :on-remove="handleRemove"
  list-type="picture">
  <el-button size="small" type="primary">点击上传</el-button>
  <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
</el-upload>
    </el-tab-pane>
    <el-tab-pane label="商品内容" name="4">
      <!-- 富文本编辑器 -->
      <quill-editor v-model="addForm.goods_introduce"></quill-editor>
      <el-button @click="btnAdd" class="addButton" type="success">添加该商品</el-button>
    </el-tab-pane>
  </el-tabs>
        </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog
  title="图片预览"
  :visible.sync="previewVisible"
  width="50%">
  <img :src="previewPath" alt="" class="previewimg">
</el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: '0',
      // 添加商品的表单对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入用户邮箱', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类列表
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover'
      },
      // 动态参数列表数据
      manyTableDate: [],
      // 静态属性列表数据
      onlyTableData: [],
      upLoadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传的请求头配置
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败')
      }
      this.cateList = res.data
    },
    // 级联选择项变化事件监听函数
    handleChange() {},
    beforeTabLeave(activeName, oldActiveName) {
      // oldActiveName即将离开的标签页名，activeName即将进入的
      // console.log(oldActiveName)
      // console.log(activeName)
      // return false
      // return false会阻止切换
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabClicked() {
      if (this.activeIndex === '1') {
        // 访问动态参数面板
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        this.$message.success('获取动态参数列表成功')
        res.data.forEach(item => {
          // 将每个item的attr_vals进行拼接成一个数组
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableDate = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态参数列表失败')
        }
        this.onlyTableData = res.data
        // this.$message.success('获取静态参数列表成功')
      }
    },
    // 图片预览事件
    handlePreview(file) {
      // console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 移除图片事件
    handleRemove(file) {
      // 该监听事件会得到删除的文件信息
      // console.log(file)
      // 获取将要删除的图片临时路径
      const filePath = file.response.data.tmp_path
      // 从pics中找到图片对应索引
      const i = this.addForm.pics.findIndex(x =>
        x.pic === filePath
      )
      // 调用数组的splice方法，把图片信息对象，从pics数组移除
      this.addForm.pice.splice(i, 1)
      console.log(this.addForm)
    },
    // 图片上传成功
    handleSuccess(response) {
    // 该监听事件会得到服务器返回的信息
    // 拼接得到图片信息对象
      const picInfo = {
        pic: response.data.tmp_path
      }
      // 将图片信息对象Push到pics数组中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm.pics)
    },
    // 添加商品
    btnAdd() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) { return this.$message.error('请填写必要表单项目') }
        // 添加商品发送请求
        // lodash包的cloneDeep方法深拷贝一份
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数与静态属性
        this.manyTableDate.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals.join(' ') }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) { return this.$message.error('添加商品失败') }
        this.$message.success('添加成功')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0 0 !important
}
.previewimg {
  width: 100%;
}
.addButton {
  margin: 10px 10px 10px 1000px;
  background-color: teal;
  border-radius: 20px;
}
</style>
